I have a problem with openFrameworks. Some 3D models are displayed correctly but basic 3D models like a chair with no texture is painted in white with no shadows. Drawing only the wireframe of the model is ok. Here is a picture of the result I am getting:
The chair model comes from Sketchup warehouse and has been converted to dae. The model is displayed correctly within Xcode and the Finder.
I am not an expert in openFrameworks and any help would be greatly appreciated.